Electric-trolley contact head



A ril 22, 1924. 1,491,403

F. D. HOU GH ET AL ELECTRIC TROLLEY CONTACT HEAD Filed Sept. 27. 1923 @Eard 2? 5m,

Patented Apr. 22, 19244 .1? 1 PATENT: OFFICE.

FRANK n. nouem'for Zion, Ann nicer. i". snun'ris,*or wauxnsan, nmmors.

nLnormomnoL -EY'*ooirrao'r HEAD.

Application filed September 27,1923. Serial 1%.. 665,104.

T 0 all whom it may concern:

Be it known that we, FRANK D. Honor; and EARL P. SHuLrIs, citizens of the United States of America, residing at Zion and vVaukegan, respectively, in the county of Lake and State of Illinois, have invented a certain new and useful Improvement in Electric-Trolley Contact Heads, of which the following is a specification.

This invention relates to that class of overhead electric trolleys in which a carrying head pivotally mounted in the harp at the upper end of a trolley pole carries a contact shoe adapted for sliding engagement with the' trolley wire, and the present improvement has for its object To provide a structural formation and assembly of parts in which a contact shoe of a compact and economical formation is arranged and held in the carrying head in a substantial yet readily detachable manner, so that as the same becomes unduly worn or otherwise damaged it can be removed and replaced by a substitute shoe, all as will hereinafter more fully appear. In the accompanying drawing:

Fig. 1, is a side elevation of the contact carrying head of an electric trolley pole, to which the present improvement is applied.

F Fig. 2, is a transverse section on line 2.2.

Fig. 3, is a longitudinal section of the cFontact shoe and insert, on line 3-3.

ig. 4, is a perspective view of the insert member.

Like reference numerals indicate like parts in the different views.

In the present construction the upper part 1 of the trolley pole harp has the usual forked form, between the side members of which the carrying head 2 and its contact member or insert 3 is pivotally mounted by the usual pivot pin or bolt 4.

The carrying head 2 comprises an elongated body portion formed with a depending heel 5 carrying the usual bearing bushing 6 which has bearing on the pivot bolt 4 aforesaid. In addition the head 2 is formed with a downwardly curved horn or extension 7 at one end, to which a secondary flexible conductor 8 is attached at one end by a bolt or rivet 8. Such flexible conductor 8 is of a loop form, with its other end attached to the harp, as shown.

;..The-carrying head 2, is also formed with upstanding side flanges or cheek plates-,9, between which is a longitudinalrecess have ing beveled side walls 10, for the reception of and holding engagement with the correspondingly formed sides of the contact member or insert 3 above referred to. Such construction provides the usual receiving groove or channel for the trolley wire, with such groove preferably of a segmental shape in cross section.

The carrying head 2, at its tail end in relation to the direction of travel, is formed with an inclined face 11, forming an upwardly and rearwardly inclined wall for the aforesaid receiving recess of the carrying head, adapted for contact with the tail end of the member or insert 3, and tending to force or wedge said insert 3 into surface contact with the beveled walls 10 of said recess.

The contact member or insert 3, is a separate and removable part, formed with a curved forward end 12, corresponding with the downwardly curved horn 7 of the carrying head 2 and fitting the outer surface thereof and secured thereto by a. rivet or bolt 13 passing through the parts as shown. The upper surface of the insert 3 is concave as shown, and in connection with the side flanges 9 of the carrying head 2 constitute the curved or segmental receiving channel for the trolley wire.

The tail end 14 of the insert 3 is preferably formed inclined so as to have extended bearing contact with the inclined wall 11 of the carrying head, above described.

Having thus fully described our invention, what we claim and desire to secure by Letters Patent, is

1. In a trolley contact head of the type described, the combination of a carrying head grooved in its upper face, to form side cheeks and having midway of said cheeks a longitudinal recess having beveled side walls, and a contact shoe formed to fit said recess and having a groove in its upper face to form in connection with the aforesaid cheek plates-the trolley wire channel of the device.

2. In a trolley contact head of the type described, the combination of a carrying head having upstanding cheek plates at its sides and a receiving groove midway of said cheek plates formed with inclined side walls, said head having a curved downturned forward end, a contact shoe formed to fit the receiving recess o'f'saidfhead and having a downtnrned forward end, 5nd fas tening means passing through said downturned ends of the parts to connectthesame together.

3. In a trolley contact head of thetype described, the combination of a carrying head having upstanding cheek plates at; its

sides and a receiving groove midway of said cheek plates formed With inclined side walls, said head having a; curved down turned forward end, a contact shoe formed to fit the receiving recess of said head and haying az downturned forward end, and fastening means passing through said downturned ends of the parts to connect the same together, the. aforesaid longitudinal recess having an inclined" "wall atits tail end for abntn ent with the similarly formed end of 2 the contact shoe. H

Signedat Waukegan, 111., this 18th day of September 1923.

ERANK D. HOUGH. EARL P. SHULTIS. 

